Last night, during Nas‘ Mass Appeal showcase at SXSW, he shared some new music he has with J Dilla produced by Madlib. The track, “The Sickness” features Jay Dee as well as production from Madlib and Dilla. Next month Mass Appeal is planning to release an album by the legendary Detroit producer J Dilla titled, The Diary. The album will feature never before heard production from Dilla as well as a number of his vocals lost over time. “The Sickness” will presumably also find its way onto the album. The Diary is said to include contributions from Snoop Dogg, Pete Rock, Bilal and more and will be released by Mass Appeal Records on April 15. Although the sound quality isn’t the best, it isn’t hard to hear the musical genius behind the track.